Absolute certainty is not something I strive for anymore. I've learned the hard way that destiny usually looks upon our most strident convictions with amusement, or perhaps even pity.
“I couldn't run a tight schedule, and if you're any good at teaching, you get sucked dry because you like your students and you're trying to help them, but you don't have any time left to write yourself.”
“Each problem that I solved became a rule, which served afterwards to solve other problems.”